fix(bridge): remove clientid config from MQTT bridges

Don't allow the user provide the clientid for connecting the remote broker.
We generate the clientid using the bridge id and node name.

apps/emqx_bridge/src/emqx_bridge_api.erl

@@ -431,8 +431,8 @@ rpc_multicall(Func, Args) ->
     end.
 
 filter_out_request_body(Conf) ->
-    ExtraConfs = [<<"id">>, <<"status">>, <<"node_status">>, <<"node_metrics">>,
-        <<"metrics">>, <<"node">>],
+    ExtraConfs = [<<"id">>, <<"status">>, <<"node_status">>,
+        <<"node_metrics">>, <<"metrics">>, <<"node">>],
     maps:without(ExtraConfs, Conf).
 
 rpc_call(Node, Fun, Args) ->

apps/emqx_connector/src/emqx_connector_api.erl

@@ -218,7 +218,7 @@ schema("/connectors/:id") ->
             {400, error_msg('ALREADY_EXISTS', <<"connector already exists">>)};
         {error, not_found} ->
             case emqx_connector:update(ConnType, ConnName,
-                    maps:without([<<"type">>, <<"name">>], Params)) of
+                    filter_out_request_body(Params)) of
                 {ok, #{raw_config := RawConf}} ->
                     Id = emqx_connector:connector_id(ConnType, ConnName),
                     {201, format_resp(Id, RawConf)};
@@ -279,7 +279,7 @@ format_resp(ConnId, RawConf) ->
     }.
 
 filter_out_request_body(Conf) ->
-    ExtraConfs = [<<"num_of_bridges">>, <<"type">>, <<"name">>],
+    ExtraConfs = [<<"clientid">>, <<"num_of_bridges">>, <<"type">>, <<"name">>],
     maps:without(ExtraConfs, Conf).
 
 bin(S) when is_list(S) ->

apps/emqx_connector/src/mqtt/emqx_connector_mqtt_schema.erl

@@ -39,7 +39,7 @@ fields("config") ->
 
 fields("connector") ->
     [ {mode,
-        sc(hoconsc:enum([cluster_singleton, cluster_shareload]),
+        sc(hoconsc:enum([cluster_shareload]),
            #{ default => cluster_shareload
             , desc => """
 The mode of the MQTT Bridge. Can be one of 'cluster_singleton' or 'cluster_shareload'<br>
@@ -76,10 +76,6 @@ topic filters for 'remote_topic' of ingress connections.
            #{ default => "emqx"
             , desc => "The password of the MQTT protocol"
             })}
-    , {clientid,
-        sc(binary(),
-           #{ desc => "The clientid of the MQTT protocol"
-            })}
     , {clean_start,
         sc(boolean(),
            #{ default => true